ISO标准规定，为维护劳动者每天工作8h，其允许的连续噪声最高为（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='24819' and id < 2121768 and id<>'2121768' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24819' and id > 2121768 and id<>'2121768' order by id asc limit 5